In 1988, the World Health Assembly resolved to eradicate poliomyelitis worldwide (1). One of the main tools used in polio eradication efforts has been the live, attenuated, oral poliovirus vaccine (OPV) (2), an inexpensive vaccine easily administered by trained volunteers. OPV might require several doses to induce immunity, but provides long-term protection against paralytic disease. Through effective use of OPV, the Global Polio Eradication Initiative (GPEI) has brought wild polioviruses to the threshold of eradication (1).

In September 2015, more than 1 year after reporting its last wild poliovirus (WPV) case in July 2014 (1), Nigeria was removed from the list of countries with endemic poliovirus transmission,* leaving Afghanistan and Pakistan as the only remaining countries with endemic WPV. However, on April 29, 2016, a laboratory-confirmed, circulating vaccine-derived poliovirus type 2 (cVDPV2) isolate was reported from an environmental sample collected in March from a sewage effluent site in Maiduguri Municipal Council, Borno State, a security-compromised area in northeastern Nigeria.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

CDC Continues to Support the Global Polio Eradication Effort The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). We are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). The world is not on track to eradicate polio by the end of 2012. Yet, we are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). The world is not on track to eradicate polio by the end of 2012. Yet, we are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). As of early 2012, the world is not on track to eradicate polio by the end of the year. Yet, we are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

The eradication of polio is an important priority for the Centers for Disease Control and Prevention (CDC). As of early 2012, the world is not on track to eradicate polio by the end of the year. Yet, we are closer than we have ever been to eradicating polio and it is critical that we take advantage of this opportunity.

Critical need to maintain immunity to poliovirus in India until global eradication achieved

ATLANTA / EVANSTON, Ill. / GENEVA / NEW YORK / SEATTLE ¦ 12 January 2012 – India appears to have interrupted wild poliovirus transmission, today completing one year without polio since its last case, in a 2-year-old girl in the state of West Bengal, on 13 January 2011.